1. Review: The Hall Plot Method
Update, April 2000

2. The Hall Plot Document (Rev. 0)
Review of the first version - an update (Rev. 1) will be soon on the web page
Contents:
The Hall plot theory
Practical applications of the Hall plot method
Early detection of slope changes
Also: The role of Hall plot and other continuous monitoring techniques in the overall well monitoring strategy

3. The Hall Plot Method Description of the basic theory
Practical aspects: examples of applications to real field data
Advantages versus disadvantages
Limitations and potential pitfalls, such as the importance of:
reservoir pressure and
correct bottom hole pressure correlation

4. The Hall Plot Method
Cumulative time - pressure multiple versus cumulative injection fluid volume
Theoretically, the (modified) Hall slope has a quantitative meaning (RII) but practically it has qualitative meaning

5. The Hall Plot Method
The core behind the Hall plot method is that it takes readily available data, and minimises fluctuations due to “noise”
The Hall plot technique is best known for well history overview
Also possible to use for more specific analysis, given that constraints are taken into account, such as steady state etc.
Early detection of slow gradual changes in slope (e.g. plugging, or flow geometry changes)

6. Continuous Injection Monitoring
These method include:
Pressure and rate versus time
Injectivity and reciprocal injectivity indices
Hall plots, etc.
Analysis of readily available data (pressure and rate) can give a strong early indication of changes in the injection behaviour
However, this analysis of often not exclusive and to explain certain behaviour, specific tests need to be performed

7. Continuous Injection Monitoring and Well Monitoring Strategy
Guidelines and best practices needed